Apparatus for constructing asphalt pavements.



No. 727,160. PATBNTED MAY 5, I903. 11. w. LASTER.

APPARATUS FOR CONSTRUGTING ASPHALT PAVEMENTS.

APPLIOATION FILED nm. 15. 1902.

H0 MODEL 8 SHEETS-BEBE? 1.v

No. 727,160. PATENTED MAY 5, 1903'.

' H. W. LASTER.

APPARATUS FOR UONSTRUGTING ASPHALT PAVEMENTS. APPLICATION FILED DBO. 15.1902.

no MODEL. 3 SHEETS-SHEET 2.

Wit/16752761: lkwnlvr: QFM% Mac Jiarrg Vidal-er wflttorlwqs PATENTED MAY5, 1903.

H. W. LASTER. APPARATUS FOR GONSTRUGTING ASPHALT PAVEMENTS.

APPLICATION FILED DBO. 16, 1902.

3 SHEETS-SHEET 3.

H0 MODEL.

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Patented May 5, 1903.

UNITED STATES PATENT OFFICE.

HARRY W. LASTER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE BARBER;

ASPHALT PAVING COMPANY, OF WASHINGTON, DISTRICT OF COLUMBIA, AND NEWYORK, N. Y., A CORPORATION'OF \VEST VIRGINIA.

APPARATUS FOR CONSTRUCTING ASPHALT PAVEMENTS.

SPECIFICATION forming part of Letters Patent No. 727,160, dated May 5,1903.

Application filed December 16.1902. Serial No. 135,188. (No model.) I

To all whom it may concern:

Be it known that I, HARRY W. LASTER, of 1 Chicago, in the county of Cookand State'of Illinois, have invented certain new and use- 5 fulImprovements in Apparatus. for Constructing Asphalt Pavements; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon,,which form a part ofthis specification.

This invention relates to apparatus for making asphalt pavements, andrefers more specificallyto a device for applying the binder r to thefoundation of such a pavement by which the asphalt wearing-surface iscemented or bound to the foundation.

Conveniently my improved apparatus is attached to a steam packing-rollerof ordinary type, whereby after the foundation has been properly packedthe roller is again passed over said foundation and the binder in amelted or fluid state is discharged upon the foundation preparatory toapplying the asphalt wearing-surface thereto. Said binderapplyingapparatus may, however, be applied 'to or made a part of any othersuitable vehicle.

The invention consists of the matters hereinafter set forth, and moreparticularly point- 0 ed out in the appended claims.

In the drawings, Figure 1 is a'fragmentary side view of a steam-roller,showing the manner of applying my invention thereto. Fig. 2 is avertical transverse section of the device for applying the binder. Fig.3 is a top plan View, with parts removed and other parts broken away, ofsaid device. Fig. 4isa' plan view taken on line4 4 of Fig. 2. Fig. 5 isa detail of the pipes for delivering steam to the heating-chamber. Fig.6 is adetail of means for operating the discharge-nozzle of the deviceand also the valve of said pipe. Fig. 7 is a vertical section taken in aplane at right angles tothat of Fig. 2.

mentary rear end view of a steamroller,

showing a modified form of the device mounted thereon.

As shown in said drawings, A designates as a whole a steam-roller offamiliar con- Fig. 8 is a frag.

'side walls thereof. at its upper end near one side with a hopper C .75

struction embracing a traction and packing 5o roller A,which-isrotatively mounted in bearings on the frame members A".

B designates the usual boiler supported on the frame in front of saidroller, and B an engine supported on the frame A and geared 5 5 to theroller A in a manner to give motion to the same in a familiar manner.

A device embodying my invention for applying the binder to thefoundation of the pavement embraces a heating box or chamher C, which isshown in Fig. 1 as supported from the rear end of the roller-frame bymeans of arms A extending rearwardly from said frame and attached to theheating-chamber near the lower end thereof, and tension- .-6 5 rods A,'attached.to the upper side of said* frame and connected at their lowerends with eyes 0, which are attached to the upper part of the chamber.Said heating-chamber is:

herein shown as made rectangular and is provided with a removable top orcover made in; two sections C, and the bottom wall of said chamber ispermanently connected with the Said chamber is provided through whichthe binding material in a semifluid state is fed to the chamber.Contained within the chamber is a heating-coil D, located near thechamber-walls and through which steam is adapted to be passed to main-8o tain the binder material in a fluid or melted state. The upper end ofthe coil is connected with a steam-header D, located at the upper end ofthe chamber, which header is connected bya pipe E with theboiler,whereby live steam 8 5 is supplied to the coil. Said pipe E isprovided with cut-off valves 6 e. The coil D communicates at its lowerend with a horizontal coil D located at the lower end of theheating-chamber, and said coil D terminates ,0 in an exhaust-pipe Dwhich extends downwardly through the lower wall thereof centrally of andat the front part of said chamber. F designates a discharge-pipe for thecham her-,through which the binder in a liquid form 5 is discharged uponthe pavement-foundation, said pipe communicating wit-ha central openingin the lower wall of the chamber and exv tending rearwardly and isprovided at its rear end with a discharge-nozzle F, which is pref the'discharge-pipe F, whereby the angular position of the nozzle upon thepipe may be varied. The pipe has loose or swiveling connection with apart on the lower wall of the tank, whereby its rear end may be swunglaterally to cover an extended area of the pavement-foundation. The rearend of the pipe is guided between upper and lower guides F F, extendingfrom hangers Ff depending from 'a plat-i'orm 0 extending rearwardly fromthe bottom wall of the chamber by means of tension-rods 0 as shown inFig. 2. Said platform C serves as a support upon which the operator maystand to direct the several movements of the apparatus. The flow ordischarge of the liquid binder from the chamber to the pipe F iscontrolled by a rotative valve G, contained in a tube or sleeve, whichconstitutes a continuation of the discharge-pipe F and extends upwardlythrough the discharge-openingin the bottom of the heating-chamber andhas rotation in said bottom. Said discharge-pipe is connected with thelower end of the tube or sleeve G by means of an elbowf. Said tube orsleeve and the hollow valve are provided with registering ports. Thetube or sleeve G is surrounded by a packing-gland consisting of a metalpacking-ring H, surrounding the tube and fitting against the bottom wallof the chamber, and a washer H, located beneath said packing-ring, andthe washer and thering are aifixed to said bottom wall of the chamber bymeans of bolts h, extending therethrough and through the bottom wall ofthe chamber, as more clearly shown in Fig. 2. In orderto hold the tubeor sleeve G, vertically stationary while permitting it to rotate, saidsleeve is provided with an annular flange g, which fits between thepacking-ring and the bottom wall of the box, and the contacting faces ofsaid flange and packi-ng-ring are correspondingly tapered. The

pipe F is given a swinging movement through the medium of a hollow shaftI, which extends upwardly through the heating-chamber and has rotativehearing at the upper end thereof in a transverse bar C attached to theside walls of the chamber and located between the cover-section O, asshown in Figs, 3 and 4. Said shaft is provided at its upper end with amanually-operable part, such as the hand-wheel I, through which re.-tary motion is imparted to said shaft to horizontally swing saiddelivery-tubeF.

' The valve G is actuated to open and close the same through the mediumof avalvestem G affixed to the valve and extending upwardly through thehollow shaft I and which is introduced to the nozzle F.

or more completely fluid state.

through the hub of the hand-wheel I, and is provided at its upper endwith an operatinglever Githrough which power is applied to rotate thevalve to open and close the same. Said hand-lever is provided with aspringactuated latch 9 (shown more clearly in Fig. 6,) which is adaptedto seat in a series of notches in the upper face of the rim of thehand-wheel 1, whereby the valve is held positively in its open andclosed positions or any intermediate position. With this construction itwill be noted that when the valve is opened the shaft 1 may be rotatedin its bearing to swingthe discharge-pipe B through the arcof its traveland that the valve G rotates with said shaft and the tube or sleeve G,whereby the position of the valve with respect to the said tube is notdisturbed by the rotation of the shaft and the swinging of thedischarge-pipe F.

The melted or fluid binder is discharged through the pipe F through theejection'action of steam or 'likefluid under pressure, Said ejectingfluid may consist of the exhauststeam from the heating-coil D, or livesteam may be introduced to said nozzle for the purpose of forcing theliquid binding therefrom. As herein shown, the nozzle is adapted toreceive both the live and exhaust steam, and

the parts are so arranged that both live and exhaust steam maybeemployed or-the exhaust steam separately. For this purpose theexhaust-pipe D leading from the lower coil 1) in the heating-chamber, isconnected, by means of a flexible hose or pipe J, with a branch F madeintegral with the nozzle F and provided with a passage whichcommunicates'with the outlet slit or passage of the nozzle F at a properangle to produce the desired ejecting action of the steam upon theliquidbinder to discharge the same through the nozzle. The live-steam pipe Eis also connected with said exhaust-pipe D by means of a branch pipe E,provided with a cut-off valve The combined use of the exhaust and livesteam is desirable when using the apparatus in cold weather, for thereason that at such times the fluid binder material in passing throughthe pipe F is exposed to a low temperature and becomes thickened andrequires a greater ejecting force to discharge it from the nozzle F thanwhen in'a thinner Moreover, the introduction of the live-steam to theexhaust-pipe D equalizes the steam-pressure in the upper and lower partsof the coil and increases the heating effect of the steam in thechamber. I

The discharge-nozzle F is shown as provided with a handle F?, by whichthe discharge-slit of the nozzle may be turned angularly, so as tocontrol the'sheet of fluid binder material discharged therefrom underall conditions oflateral air cu-rrents which may have an influence onthe discharging isdischarged from the heating-chamber the Saidpartitions divide the chamber into comrear end thereof.

municating compartments and tend to pre-.

vent the vibration of the vehicle to which the device is attached fromsplashing the liquid binding material out of the chamber through thehopper thereof.

In Fig. 7 I have shown the heating-chamber of my improved apparatus asbeing supported on the top of the roller-frame at the As shown in saidfigure,

' L designates the heating-chamber, and L the I filling-hopper thereof.M designates a steampipe leading from the boiler and connected with theupper part of the steam-coil in the chamber L through the medium of avalved branch pipe 1 The liquefied binding material is discharged fromthe heating-chamber through the medium of a flexible pipe N, which leadsfrom the bottom wall of said chamber near the rearend thereof. Said pipeN extends downwardly from said chamber and is adapted to drag behind theroller upon the pavement-foundation and is provided at its rear end witha discharge-nozzle N, made substantially like the discharge-nozzle F ofthe construction heretofore described. Said discharge-nozzle isconnected with the exhaust-pipe O of the coil in the chamber L throughthe medium of a connection-pipeO,

the rear end of said pipe 0 being connectedwith a branch N of saiddischarge-nozzle in the same manner as is the flexible pipe J connectedwith the nozzle F of the previouslydescribed construction. Saidexhaust-pipe O 'is also connected with the live-steam pipe M through themedium of a valved branch pipe M whereby both live and exhaust steam maybe supplied to said nozzle. The pipe N, through which the fluid bindermaterial is discharged, is provided near the heating-chami ber L with avalve N by which the flow of material through said pipe is controlled.The nozzle N is provided with a handle P, by

which it may be manipulated to spread thematerial over thepavement-foundation, and said handle is provided at its lower part with-one or more rollers P, which are adapted to support the weight of thenozzle. The pipes O and N are preferably wire-wound, so as to withstandthe wear occasioned by the dragi ging of said pipe on thepavement-foundation.

An important advantage gained by the use of the apparatus herein shownis that fluid binder material may be spread evenly and uniformly overthe pavement-foundation,and

by reason of the regulating-valves located in the pipe through whichthebinding material thickness or layer of the binding material laid uponthe pavement-foundation say be varied as desired.

Another important advantage gained-by the terial may be spread upon thepavementfoundation much more rapidly and with vailing practice, whichconsists of pouring the material upon the pavement-foundation fromsuitable spouts through which the-material is discharged upon thefoundation, said vessels being carriedfrom heating or melting pots ortanks by attendants to the places where the material is to be applied.With the use of my apparatus I am enabled to dispense with the servicesof all but one person heretofore required for laying or spreading saidbinder material. said apparatus upon the steam-roller commonly employedfor packing the pavementfoundation is a convenient arrangement; but itwill be understood that saidjapparatus may be supported and conveyedfrom place to place upon any other suitable vehicle provided with thenecessary heating devices for keeping the binder material in a fluidstate and forcing devices for discharging the fluid from theheating-chamber to the pavementfoundation. It is to be understood,furthermore, that various changes may be made in the parts withoutdeparting from the spirit of my invention, and I do not wish to belimitmade the subject of specific claims.

I claim as my invention 1. An apparatus for the purpose set forthcomprising, in combination with a suitable vehicle, a heating-chamberfor the binder material, means for heating said chamber, ahorizontally-swinging discharge-pipe leading from said chamber andprovided with a nozzle having a narrow, generally horizontaldischarge-orifice, means for swinging said discharge pipe horizontallyat the time the binder material is being discharged therefrom, and meansfor applying a fluid under pressure for forcibly discharging said bindermaterial through said pipe and nozzle.

comprising, in combination with a suitable vehicle and a steam-generatorcarried thereby, a heating-chamber for the binder material, a heatingdevice in said chamber which receives steam from the generator, ahorizontally-swinging discharge-pipe for said chamber provided with adischargenozzle, and means for delivering steam under pressure from saidgenerator to forcibly discharge the binder material through said pipeand nozzle.

3. An apparatus for use in constructing asphalt pavements comprising,.in,combination l carried thereby, a heating-chamber, a steam vessels ofrelatively small papacity having As before stated, the mounting of g useof my apparatus is that the binder ma-\ greater economy than under thepresent prethe structural'details and the arrangement of ed to thedetails shown except as hereinafter I 2. An apparatus for the purposeset forth with a suitable vehicle and a steam-generator;

heating device in said chamber which receives steam irgm said generator,a discharge-pipe for said chamber provided with a nozzle and a pipe fordelivering steam under pressure to said nozzle.

4. An apparatus for use in constructing asphalt pavements comprising, incombination with a suitable vehicle and a steam-generator carriedthereby, a heating-chamber, a'steam heating device in said chamber whichreceives steam from said generator, a discharge-pipe for said chamberprovided with a nozzle, and a pipe leading from the exhaust end of saidheating device to said nozzle.

5. An apparatus for use in constructing asphalt pavements comprising, incombination with a suitable vehicle and a steam-generator carriedthereb'y,a heating-chamber, a steam heating device in said chamber whichreceives steam from said generator, a discharge-pipe for said chamberprovided with a nozzle, a pipe leading from the exhaust end of saidheating device to said nozzle, and a steampipe leading from thegenerator and discharging through said nozzle.

6. An apparatus for use in constructing asphalt pavements comprising, incombination with a suitable vehicle, a heating-chamber for the bindermaterial, a steam heating device in said chamber, means for supplyingsteam thereto, a discharge-pipe for said chamber provided with a nozzlehaving a restricted, generally horizontal, discharge-opening, and asteam-pipe for delivering steam u nder pressure to said nozzle. 7

7. An apparatus for use in constructing asphalt pavements comprising, incombination with a suitable vehicle, a heating-chamber for the bindermaterial,adischarge-pipe provided with a nozzle havinga narrow,generally horizontal, discharge-opening, means for forcibly dischargingthe binder material through said nozzle, and means for varying theangular position of said nozzle upon said pipe.

8. An apparatus for use in constructing asphalt pavements comprising, incombination with a steam-roller, a steam-generator, and an engine whichreceives steam from said generator and geared to the traction-roller tooperate the same, a heating-chamber, a heating device in said chamberwhich receives steam from said generator, 2. discharge-pipe forsaidchamber provided with a nozzle, and a pipe for delivering steamunder pressure to said,

nozzle.

9. An apparatus for use in constructing asphalt pavements comprising, incombination with a steam-roller, a steam-generator, and an engine whichreceives steam from said generator, and is geared to the traction-rollerto operate the same, a heating-chamber, a heating device in said chamberwhich receives steam from said generator, a horizontallyswingingdischarge-pipe forsaid chamber provided with a nozzle having a slitteddischargeopening, and a pipe for delivering steam under pressure to saidnozzle.

10. An apparatus for use in constructing asphalt pavements comprising,in combination with a steam-roller provided with asteamgenerator andengine which receives steam from said generator and is geared to thetraction-roller to operate the same, a heatingchamber, a heating devicein said chamber which receives steam from said generator, at discharge'pipe for said chamber provided with a nozzle, a pipe connecting theexhaust end of the heating device with said nozzle and a pipe leadingfrom said generator to the ex= haust-steam pipe and provided with avalve.

11. An apparatus for use in constructing asphalt pavements comprising,in combination with a suitable vehicle and a steam-generator carriedthereby, a heating-chamber for the binder material, a heating device insaid chamber which receives heat from the generator, a discharge-pipefor said chamber provided with a, nozzle, means for delivering steamunder pressure 'to said nozzle, means for swinging said discharge end ofthe nozzle and a valve for controlling the passage of the bindermaterial through said pipe.

12. 'An apparatus for use in constructing asphalt pavements comprising,in combination with a suitable vehicle, a heating-chamber for the bindermaterial, a horizontallyswinging discharge-pipe for said chamber provided with a nozzle, a pipe for delivering a fluid under'pressure tosaid-nozzle, a rotative shaft connected with said discharge-pipe forswinging the same and provided with a handwheel or like device forrotating the shaft, a valve for controlling the passage of the bindermaterial "through said discharge pipe and adapted to rotate with saidshaft, a valve-stem connected with and operating said valve, alever forrotating said valve-stem and means for locking said valve-stem lever tothe said handwheel.

13. An apparatus for use in constructing asphalt pavements comprising,in combination with a suitable vehicle, a heating-chamher for the bindermaterial, a horizontallyswinging discharge-pipe for said chamberprovided with a nozzle, a pipe for delivering a fluid under pressure tqsaid nozzle, a hollow rotative shaft connected with said dischargepipefor swinging the same, and provided with a hand-wheel or the like forrotating said shaft, a valve for controlling the passage of the bindermaterial through said pipe and adapted to rotate with said shaft, avalvestem connected with said valve and extending upwardly through saidhollow shaft, a lever for rotating said valve-stem, and means forlocking said lever to said hand-wheel.

14. An apparatus for use in constructing aspiiilt pavements comprising,in combination with a suitable vehicle, and a steam-generator carriedthereby, a heating-chamber, a

steam heating device for said chamber which In testimony that I claimthe foregoing as receives steam'from said generator, a dismy invention Iaffix my signature, in pres-'10 charge-pipefortheheating-chamberprovided ence of two witnesses, this Sth dayof'Dewith anozzle, a steampipe for delivering cember, A. D. 1902.

steam to said nozzle, and one or more parti- HARRY W. LASTER. tions insaid chamber dividing the same into Vitnesses: a plurality ofcompartments communicating \VILLIAM L. HALL,

. with each other at the bottom of the chamber. GERTRUDE BRYCE.

